Speed of sound in solidsskmϖ=Qualitatively:Larger ϖ, larger vLargerd, largervDetailed derivation:vdϖ=Speed of sound in a solid2

Derivative form of the Momentum PrincipleThe Momentum Principle∆°p=°Fnet∆t∆°p∆t=°FnetThe rate of the momentum change is equal to forceWorks only if forceis constant during ∆td°p∆°pIf force changes introduce instantaneous rate of change:dt≡lim∆t→0∆tThe momentum principled°pdt=°Fnet3

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